Window structure



Sept. 21, 1954 P. R. CHAPIN wmnow STRUCTURE 2 Sheets-Sheet 1 Filed July 28, 1949 Perry fi gag m ATTORNEYS Sept 21, 1954 P. R. CHAPIN WINDOW STRUCTURE 2 Sheets-Sheet 2 Filed July 28, 1949 INVENTOR.

A TTORNEYS Patented Sept. 21, 1954 OFF-ICE WINDOW STRUCTURE Perry R. *Ghapin, Weslaco, Tex., assignor to Gueneviere Chapin, Kingston, Pa.

Application July 28, 1949, Serial No. 107,352

8 Claims. .1

This invention relates to new and useful improvements in window structures.

One object of the invention is to provide an improved window constructed as a unit which may be mounted in an opening in thewall of the building with a minimum of fitting and-construction work whereby the cost of installation is greatly reduced.

Another object of the invention is to provide an improved window which is economical and simple to construct whereby an inexpensive product is obtained.

Yet another object of the invention is to provide an improved window which functions as an ordinary double-hung window, and in which either or both of the windowpanes or glasses may be swung outwardly from the window frame to provide enhanced and additional ventilation.

A particular object of the invention is to provide an improved window of the double-hung window opening and providing unobstructed ventilation therethrough.

A still further object of the invention is to p'r'o vide an improved window of the character described having novel means for latching the pivotally mounted section for holding said section in a closed position and for permitting the outward swinging thereof.

A further object of the invention is to provide an improved window of the double-hung variety in which the window glasses or panes slide in guide channels disposed vertically within the win dow frame, and having novel means for holding said glasses or panes in desired positions.

Another object of the invention is to provide an improved window structure having a novel screen-mounting arrangement which permits replacement of the screen from the inner side of the window and greatly simplifies the screen structure.

An additional object of the invention is to provide an improved window structure having a,

unique frame which allows the quick and ready joining of a plurality of said windows into sets 2 to provide double, triple or even larger sets of windows.

construction designed to carry out the inventioh will he hereinafter described together with other features of the invention.

The invention will be more readily understood from areading of the following specification and by reference to the accompanying drawings, wherein an example of the invention is shown, and wherein:

Fig. 1 is a perspective view of a window constructed in accordance with the invention and showing the pivotany mounted section of the wmuew training in its outwardly swung position,

Fig. 2 is a View similar to Fig. 1 showing the window glasses completew removed,

Fig. 3 is a perspective View of the pivotally mounted section,

Fig. 4 is an exploded, perspective view illustrating the means of joining the corners of the window training,

:5 is a vertical, cross sec'tional view of the window,

Fig. '6 is a fragmentary, elevational view of the inner raceof the window, partially broken away to illustrate the locking and securing structure,

Fig. 7 is "a vertical, cross-sectional view taken at right angles to Figfi'through one of the window frame stiles and illustrating further the locking and retaining mechanism.

8 is a horizontal,cross sectionalview taken through one of the window training stiles, and Fig. 9 is an enlarged, perspective view of one or the lockingsand retaining devices.

The pr e' rr'ed embodiment of the invention entails the use of metallic construction throughout for the window. :It is to be noted, however, that wood or other suitable material may be employed for the purposes of constructing the window, obvious modifications in the example of the invention as shown the drawings, being made as necessary. The preferred metallic construction has been found "to offer many advantages, and it is further desirable that aluminum or other light metals or metallic alloys be employed becauseor their attractive appearance, lightness of weight, and characteristicsof durability.

In the drawings,- the numeral [0 designates a rectangular window frame having a top rail II a lower rail l2 and right and iefnhand rails l3 and ii, respectively, as viewed from the inner side of the window appearing in Fig. 1.

Again, the iliustration of a particular embodiment of the "invention, appearin in the. drawings, is directed to the preferred form of the invention, and shows specific structures or forms of the various members which have been found most advantageous. It is to be noted, however, that the invention is not limited to the particular shapes or forms shown, nor to their manner of attachment one to the other, but rather to the general principles of the structure without limitation to specific shapes or mechanical expedients employed.

The top rail H and bottom rail [2 are preferably formed of the same type of hollow or box extrusion, illustrated in Figs. 4 and 5. The rails comprise elongate, hollow members open at each end, the lower rail l2 being provided with a longitudinally extending groove [5 upon its upper side and adjacent the outer edge thereof. A bevelled flange or lip I6 projects upwardly from the rail outwardly of the groove [5 and substantially in vertical alinement with the outer face of said rail. A similar groove H is formed in the lower face of the upper rail ll, adjacent the outer edge thereof, and a skirt or flange l8, similar to the flange l5, depends from the upper rail outwardly of the groove H and substantially in vertical alinement with the outer face of said rail.

- A bifurcated block I9 is inserted in each open end of each rail, the blocks l9 having a snug fit within the interior of the hollow rails and being suitably secured therein as by welding or the like. A vertical rib is formed upon the projecting end of each of the blocks [9 for purposes of dove-tailing or securing the top and bottom rails to the side members or stiles I3 and. i l. The stiles are formed of a channel-shaped section or extrusion, illustrated in Fig. 8, and having a relatively thick web 2! forming the bottom of such channel shape. A bevelled flange 22, similar to the flanges It and [8, projects from the inner faces of both stiles toward the longitudinal center of the window and extends longitudinally of each stiles at the forward edge or corner thereof. With this arrangement, when the rails and stiles are assembled, the flanges l6 and i8, and the flanges 22, are all disposed in substantially the same vertical plane.

Each of the stiles l3 and M are provided with elongate grooves or recesses 23 upon their upper and lower ends, said grooves extending partially through the webs 2| adapted to receive the ribs 20 of the blocks l9 carried upon and in each end of the upper and lower rails. The ribs may be welded or otherwise suitably secured within the recesses 23 and thus provide corner joints for connecting the stiles and rails into a unitary, rectangular frame. Lightweight channel-shaped members 24 are received within the open sides of the channelshaped stiles ls'and l4, and thus serve to close said stiles. The members 24 also function in connecting a series of windows constructed in accordance with this invention, one of the members 24 being removed from one edge of each window and the remaining member 24 being engaged with the abutting stiles of a pair of windows arranged side by side, thereby permanently connecting and joining the windows in an alined and rigid relationship.

A double groove guiding element or guideway 25 is disposed vertically along the inside edge of each of the stiles l3 and I4 and extends throughout the height of said stiles. The guideways 25 carry a pair of parallel guide grooves, the outer groove 26 being adapted to receive and accommodate the upper or outer windowpane of the stiles and being or window glass 21, and the inner groove 28 receiving and accommodating the inner or lower pane 29. Each of the guideways is divided into an upper section 30 which is removably secured to the upper portion of one of the frame stiles, and into a lower section 3| pivotally mounted within the lower portion of the window frame and disposed adjacent the lower portion of the frame stile, as will be described more fully hereinafter. The out between the upper and lower sections of the guideways is substantially Z- shaped, asshown at 32 in Fig. 5, the cut extending at an angle downwardly and outwardly across the guideways and having a vertically offset portion at-33 in Fig. 5, in vertical alinement with the outer groove 26. The angular disposition of the cut 32 permits the upper portion of the lower guideway section 3! to be swung inwardly with respect to the upper guideway section 30, while the vertical offset 33 prevents the interference with this swinging movement by the upper or outer windowpane or glass 27. Each of the grooves 26 and 23 receive felt mohair, or any other suitable type of a sealing lining 34, and the grooves are provided with lips 35 which enclose the sealing lining 34 and closely abut the faces of the window glasses 2? and 29.

The upper ends of the lower guideway sections 3| are connected by a transverse bar 36, shown as rectangular in cross-section but which may be of any suitable shape or cross-section, and which extends transversely of the window opening adjacent the medial portion thereof. The ends of the bar 36 are suitably affixed to the upper ends of the lower guideway sections 3|, the bar extending'horizontally between the window glasses, and cooperating with the adjacent portions of the window glasses in such position to provide a weather tight seal. The lower ends of the lower guideway sections 3! are similarly joined by a transverse member 3'! extending horizontally of the window and suitably secured at its ends to the lower ends of said guideway sections. The member 31, the bar 35, and the lower guideway sections 3|, thus form a complete and rigid rectangular frame or subframe A entirely separate from the window frame i0, proper. This sub-frame or section is pivotally mounted upon the lower portion of the window frame proper by means of rib elements 38 secured to the lower and inner edges of the sections 3| and received within bifurcated hinge members 39 secured to the inner face of the window frame comprised at this point by the lower rail l2 and the lower ends of the stiles or side members I3 and M. A suitable removable pivot pin '40 extends through each of the hinge members 39 and through openings ii provided in the rib elements 38 whereby the sub-frame A may be pivotally swung about said pin inwardly and away from the main window frame Ill.

The pins 40, being of a readily removable nature, may be withdrawn and the entire sub-frame A removed from the window opening as will be described more fully hereinafter. Further, for limiting the swinging movement of the sub-frame, the rib elements 38 are provided with downwardly and inwardly extending lugs 42 adapted to abut the lower rail I2 and limit the inward swinging of said sub-frame.

The transverse member 3'! is hollow or box-like in cross-section and has a longitudinal slot 43 cut in its upper surface. A channel-shaped, bottom edge member 44 receives the lower edge of the lower window glass 29, a suitable sealing gass amans ket or strip 45 being disposed therebetween, and is provided with an inwardly and horizontallyextending flange 4.6 which functions :as a handle .or

lifting member for said lower window glass.

The transverse thickness of the member 44 is substantially :equal .to the width of the slot 43 whereby said member may project downwardly through saidrslot into the interior of the mem ber 31. A plurality of .coi'led springs 41 are disposed within the member 31, receiving the lower face of the member 44 and normally supporting the lower window glass in the position shown in Fig. 5.

Upon the upper edge of the lower :pane 29, a U-shaped edge member 43 is pressed, there being-provided a suitable sealing strip or lining 49 within the member "48 which seals off the joint between the member and the edge of the glass. As shown in Fig. 5, the outer face of the member 48 has a close sliding fit with the inner face of the bar 36 thus providing a weather tight joint when the lower pane is in its lowered position.

The lower portion of the inner face of the upper pane 21 similarly abuts the outer face of the bar 36 when said upper pane is in its raised position, while the upper edge of the upper pane is received within the felt-lined groove 50 of an upper transverse channel member 5| secured to the underside of the upper rail II. The groove 5 of the member 5| is in vertical alinement with the groove 26 of the upper and lower guideway sections 38 and 3|, while the slot 43 of the lower member 31 is in vertical alinement with the inner grooves 28 of said upper and lower guideway sections, and provision is thus made for full and complete raising and lowering of both window glasses and for proper sealing of said glasses in their closed position. It is to be noted that both glasses or panes are free of any sash structure insofar as the guide grooves are concerned, and that only the lower pane or glass isprovided with the members 44 and 48 which function as sealing and trim members. Of course, such trim members may be employed with both glasses, if such is desirable.

The upper channel member 5| extends the length or" the upper rail ll and substantially the width thereof, being provided with an upstanding rib or flange 52 received within the grooves l1, and having its outer edge disposed closely adjacent the inner face of the flange 18. At the lower end of the window and upon the upper face of the bottom rail 12, a similar member is provided comprising an elongate bar or strap 53 secured to the outer portion of the upper face of, said lower rail and carrying a depending rib or flange 54 received within the groove N5 of the bottom rail. The inner edge of the strap 53 is ohamfered to form a bevelled joint 55 with the outer edge of the member 3?. The ribs 52 and provide means for securing in place a Wire cloth screen 56 covering the entire window opening. The upper edge of the screen 56 is clamped within the groove H by means of the upstanding ribs 52, while the lower edge of the screen is clamped within the groove It by means of thedepending ribs 54. The lateral edges of the screen 56, as is shown in Fig. 8, are confined between the flanges 22 of the frame stiles l3 and I4 and the outer edges of the guideways 25. These lateral edges are not clamped but are merely confined within this space, thus providing adequate screening but greatly facilitating the installation or replacement of said screen, from the inner sideof the window frame.

In its closed position, the sub-frame A is in verticalalinement with the upper guideway sections '30,. as shown in Fig. 15, while in its open position, the sub-frame is tilted outwardly with respecttto the frame rl tl, asshown in Fig. 1. For .retaining the sub-frame a closed position, the upper channel member '48 .of the lower window glass 29 carries a pair of upstanding lugs or fins 5! at each end. shown in Fig. 6, the fins .51 project laterally beyond the ends of the member :58 and into the grooves 28 0f the guideways 25. In the normal closed position of the lower window glass 29, the fins .51 bridge the cut 32 and thus by engagement within the groove 23 of the upper .guideway sections 30, prevent the outward swinging of thesub-frame A. Upon manual depressing of the lower window glass 29, so as to compress the springs 11, the fins or lugs 51 are moved downwardly from their bridging position and the sub-frame may be swung outwardly to the position shown in Fig. 1. When it is desired to return the sub-frame to its closed position, the procedure is reversed by depressing the lower glass within the lower member 31 and moving the sub-frame to its closed position. Thereupon, the lower glass may be released whereby the springs .41 will function to move the lugs 51 upward into .a bridging and locking position. It is further to be noted thatthe sub-frame A may be moved to and from its open position while it is carrying only the lower window glass 29, or while it is carrying the upper window glass 21 in addition. The vertical offset 33 and the cut 32 prevent the lower edge of the upper window glass from interfering with the swinging operation'when the upper glass is in its raised position, but it also permits such swinging movement when the upper glass is in its lower position for the reason that the elements are so dimensioned and the cut 32 so positioned as to place the upper edge of the upper .glass within the confines of the cut and offset when said upper window is in its lowermost position. In this connection, it is to be noted that a pair of stops .58 are provided at the lower ends of the channels or grooves 25 of the lower guideway sections 3 I, said stops serving to position the lower edge of the upper glass above the upper surface of the member 53 when said upper sash is in its lowermost position. This provision permits the insertion of a persons fingers beneath the lower edge ofthe upper glass to facilitate the raising of the same when such is desired and prevents the upper glass from falling out or jamming when the sub-frame is tilted or swung outwardly.

As previously pointed out, by removal of the pivot pins 40, the entire sub-frame A may be removed from the main window frame It). Thus, both window glasses may be lowered into the sub-frame, the same moved to its open position as previously described, and then removed entirely from the window by withdrawal of thepivot pins 40. With this arrangement, ventilation may be had through the entire window opening rather than through only one-half of said opening as is the case with ordinary double-hung windows.

Such opening and removal of the sub-frame also permits the ready replacement of either of the window glasses. When the sub-frame is swung to its open position, as shown in Fig. 1, the lower glass 29 may be completely removed simply by withdrawal upwardly and outwardly from the sub-frame. Similarly, the outer or upper glass 21 may also be removed by upward and outward withdrawal. This permits the quick and easy replacement of either of the window glasses, and

also permits the complete removal of said glasses for the purpose of washing the same. Of course, by proper manipulation, both sides of both glasses may be washed from the interior by selective lowering of the same with the sub-frame A and by the swinging of said sub-frame into an open position.

A unique arrangement is provided for locking the windowpanes in their closed position and for holding said panes at any desired elevational position within the frame ID. A pair of leaf springs carry friction elements for this purpose, one spring being alined with the outer groove 26 and the second spring being alined with the inner groove 28. As shown in Figs. 6 and 7, the lock and brake for the lower glass 29 is positioned immediately below the horizontal or transverse center of the window frame and is carried in the left- .hand stile Hi. The lock includes a substantially T-shaped leaf spring 59 recessed in the inner face of the web 2i of said stile and having its free end projecting upwardly and overlying a slot or window cut 69 in said web. A brake and locking pin 6| is provided upon the upper extremity of the leaf spring and projects inwardly toward the edge of the lower glass 29. A barrel cam 62 is mounted tran versely of the stile I 3, being carried eccentrically on a spindle or shaft 63 having its outer end journalled in a ferrule 64 pressed into the outer wall of said stile, and having its inner end projecting through the inner wall and carrying a suitable operating handle or knob 55 which is thus readily accessible from the inside of the window. It is obvious that revolution of the cam 62 will cause flexing of the spring 59 and movement of the pin 51 toward and away from the edge of the window glass 29. An opening 66 is cut through the left-hand, lower guideway section 3! in alinement with the groove 28 thereof and in the path of movement of the pin 6 l. Thus, as the cam '62 is revolved, the pin is caused to move through the opening 66 into engagement with the edge of the lower glass 29, and to be retracted from said position. For the purpose of locking the lower glass 29 in its lower position, a small notch or recess 6'! is out in the left-hand edge thereof, said recess being in alinement with the opening 66 when the glass is lowered and receiving the inner end of the pin 61 whereby upward movement of the lower glass is prevented. In other positions of the lower glass, the inner end of the pin BI is moved into frictional engagement with the left-hand edge of the lower glass, such engagement being adequate for holding said glass in an adjusted position.

A substantially identical construction is provided for'locking of the upper glass 2'51 and for holding said glass in an adjusted position. The upper locking structure is disposed adjacent but above the transverse center of the window, and is carried by the left-hand stile M in alinement with the groove 26 of the left-hand, upper guideway section Ill. The unit comprises a leaf spring 68 recessed in the face of the web 2i and having its lower end extending downwardly and overlying a window 69 cut in said web. The spring is actuated by a barrel cam H3, similar in all respects to the cam 62 and being provided with an operating knob or handle ll upon the inner face of the left-hand stile M. The spring 80 carries a locking pin 72 adapted to be received within a notch 13 out in the lower portion of the left hand edge of the upper pane 21, and adapted alternately to be moved into frictional engagement with the left-hand edge of the upper pane for holding the same in adjusted, elevational posi tion.

It is to be noted that the lower locking device, in addition to controlling the movement of the lower glass, also serves as a supplementary lock for holding the sub-frame A in its closed position. Since the pin 6! projects through the opening 56 cut in the side of said sub-frame, the pin will normally function to prevent outward swinging of the sub-frame structure.

It is also to be noted that the particular arrangement of the locking structure permits'the quick and ready repair thereof. It is highly unlikely that the barrel cams 62 and 18 will become defective or excessively worn so as to require their replacement. The leaf springs 59 and 68, however, may fatigue after years of use, and might break or become so weak so as to require replacement. In such event, both are easily replaced because they are secured to the inner face of the web 2| which is easily accesible. Mere outward swinging of the sub-frame A exposes the lower leaf spring 59, and it may easily be removed and replaced. Similarly, lowering of both glasses into the sub-frame A will permit the detachment of the left-hand upper guideway section 36, and will expose the upper leaf spring so that it also may be detached and replaced.

Although the shape and composition of the pins 6i and 12 are not particularly critical, it has been found desirable to form said pins of a relatively hard carbon core 14 surrounded by a brass or other soft metal sleeve or ferrule 75. In this manner, the edges of the window glasses are protected against accidental chipping, and some degree of friction reduction is achieved whereby undesirable chattering or grating of the pins against the edges of the window glasses is eliminated.

The advantages of this window structure are manifest. It comprises a single unitary structure which is extremely flexible in use in operation and which includes a complete window with framing, screening and all necessary appurtenances. The entire unit may be set in an opening in a wall with a simple caulking and securing operating and the expense of extensive installing operations by skilled and expensive workmen is avoided. The window may be used in the same fashion as the ordinary double-hung window, or the sub-frame A may be swung outwardly with either the lower glass 29, as shown in Fig. 1, or with both window glasses to provide additional ventilation. When the fullest ventilation and window opening is desired, both glasses may be lowered into the sub-frame and the latter completely removed to expose the entire window opening without obstruction of any kind. Both window glasses may be washed upon both sides from the interior, and both may be readily replaced should they become damaged. Further, the simple removal of the upper channel member 5! and the lower channel member 53 will permit replacement of the wire cloth screening 56, this also being accomplished from the interior and eliminating the need at any time for access to the exterior side of the window.

The unitary structure of the sub-frame A is important and is to be stressed. The joining together of the lower guideway sections 3| by the bar 36 and the member 31 forms the subframe into an integral structure which is easily manipulated, removed, and handled after rem'oval'a The rigidity of the sub frame protects the windowpanes against twisting: and other stresses and minimizes their chances of breakage.

It is further to be noted" that the sub-frame is normally removed from the frame It with its lower edge downward. In this position, the window glasses cannot fall therefrom,-, and; the removal and replacement of, the sub-frame is facilitated and simplified.

The foregoing description of the invention is explanatory thereof and variouschanges in the size, shape and materials, aswell as in the details of the illustrated construction may be made, within the scope of the, appended claims, without departing from the spirit ofthe invention.

What I claim and desire to secure by Letters Patent is: g

l. A window including, a frame, windowpane guideways within theframe, windowpanes having sliding engagement within the guideways, said guideways being divided into upper and lower sections, the upper section being secured to the frame, the lower section being pivotally connected to the frame, and transverse members extending across the frame and being fixedly secured to the upper and lower ends of the lower guideway section.

2. A window including, a unitary frame, windowpane guideways within the upper portion of the frame, a unitary sub-frame pivotally and removably mounted within the lower portion of the frame, and adapted to be swung thereinto and therefrom, said sub-frame having windowpane guideways alined with the frame guideways when the sub-frame is swung into the frame, transverse members extending between and fixedly joined to the upper and lower ends of the sub-frame guideways.

3. A window including, a frame having upright stiles with a bottomrail and a top rail, a sub-frame pivotally mounted in the lower portion of the frame and occupying substantially the lower half of the frame, said sub-frame including upright windowpane guideways joined at their upper and lower ends by transverse connecting members, and being mounted to swing in a vertical arc into and out of the frame, guideways carried by the upper portions of the frame stiles and alined with the sub-frame guideways when the sub-frame is swung into the frame,

windowpanes slideably mounted in the two sets of guideways, and frictional retaining means projecting through the guideways for engaging the edges of the windowpanes and holding the latter in adjusted positions, said retaining means being extensible to a point within a note in said windowpane.

4. A window including, a frame having upright stiles with a bottom rail and a top rail, windowpane guideways within the frame at each side thereof divided into upper and lower sections, the upper guideway section being secured to the upper portions of the stiles, the lower guideway section having its lower ends pivotally mounted to the lower portion of the frame and being adapted to swing in a vertical are in alinement with the upper guideway section into and out of the frame, an upper bar secured to and extending between the upper ends of the lower guideway section, a lower bar secured to and extending between the lower ends of the lower guideway section, said lower bar abutting the frame bottom rail when the lower guideway section is swung into the frame, and windowpanes slideably mounted in the guideways,

5-. A window including, a frame having upright stiles with a bottom rail anda top rail, windowpane guideways within the frameat, each side thereof divided into upper and lower sections, the upper guideway section being secured to the upper portions of the stiles, hinges connecting the lower ends of the lower guideway section to the lower portion of the frame whereby the latter section may be swung in a vertical arc in alinement with the upper guideway section into and out ofthe frame, said hinges having readily removable pivot pins whereby the'lower guideway section may be removed from the frame, an upper bar secured to and extending between the upper ends of the lower guideway section, a lower bar secured to and extending between the lower ends of the lower guideway section, said lower bar abuttig the frame bottom rail when the lower guideway section is swung into the frame, and windowpanes slideably mounted inthe guideways.

6. A window including, a frame having upright stiles with a bottom rail and a top rail, windowpane guideways within the frame at each side thereof divided into upper and lower sections, the upper guideway section being secured to the upper portions of the stiles, the lower guideway section having its lower ends pivotally mounted to.the lower portion of the frame and being adapted to swing in a vertical arc in alinement with the upper guideway section into and out of the frame, an upper bar secured to and extending between the upper ends of the lower guideway section, a lower bar secured to and extending between the lower ends of the lower guideway section, said lower bar abutting the frame bottom rail when the lower guideway section is swung into the frame, windowpanes slideably mounted in the guideways, leaf springs carried upon the inner side of one stile beneath the upper and lower guideway sections adjoining that stile, friction pins carried by the springs adapted to project through said sections into engagement with the edges of the windowpanes, and means within the latter stile for flexing the springs to move said friction pins, said pins being extensible into notches provided in said windowpanes.

7. A window including, a frame having upright stiles with a bottom rail and a top rail, windowpane guideways within the frame at each side thereof divided into upper and lower sections, the upper guideway section being secured to the upper portions of the stiles, the lower guideway section having its end pivotally mounted to the lower portion of the frame and being adapted to swing in a vertical arc in alinement with the upper guideway section into and out of the frame, an upper bar secured to and extending between the upper ends of the lower guideway section, a

lower bar secured to and extending between the lower ends of the lower guideway section, said lower bar abutting the frame bottom rail when the lower guideway section is swung into the frame, windowpanes slideably mounted in the guideways, one of the frame stiles having openings underlying the upper and lower guideway section adjoining that stile, leaf springs recessed in the inner side of the latter stile with their free ends overlying the openings, friction pins carried upon the free ends of the springs projecting toward the guideway section, the latter having openings adapted to receive the friction pins, notches in the edges of said windowpanes adapted to receive said pins, and cam means within the latter stile for flexing the springs and moving the pins through the guideway sections 11 into engagement with the edges of the windowpanes.

8. A window including, a frame having upright stiles with a bottom rail and a top rail, windowpane guideways within the frame at each side thereof divided into upper and lower sections, the upper guideway section being secured to the upper portions of the stiles, hinges connecting the lower ends of the lower guideway section to the lower portion of the frame whereby the latter section may be swung in a vertical arc in alinement with the upper guideway section into and out of the frame, said hinges having readily removable pivot pins whereby the lower guideway section may be completely disconnected and removed from the frame, an upper bar secured to and extending between the upper ends of the lower guideway section, a lower bar secured to and extending between the lower ends of the lower guideway section, said lower bar abutting the frame bottom rail when the lower guideway section is swung into the frame, windowpanes slideably mounted in the guideways, and means forming a part of said hinges for limiting the outward swinging of the lower guideway section.

Number Number Name Date Bitner May 22, Mead Oct. 30, Goforth Aug. 2, Taylor Sept. 22, Roberts July 4, Lippincott July 18, Gruhl July 16, Perzeszty July 8, Butcher Sept. 2'7, Ormsby 1 Nov. 29, Marschke Dec. 31, Lancaster Jan. 14, Hurley et a1 June 2, Barrows et a1 Mar. 3,

FOREIGN PATENTS Country Date Great Britain July 1 0-, 

